Compilare: user.cpp: In function ‘void citire(A&)’: user.cpp:18:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned int i=1;i<=n;i++) ^ user.cpp:19:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned int j=1;j<=m;j++) ^ user.cpp:28:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned int i=1;i<=t;i++) ^ user.cpp: In function ‘void afisare(A)’: user.cpp:37:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned int i=1;i<=n;i++) ^ user.cpp:39:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned int j=1;j<m;j++) ^ user.cpp: In function ‘void schimbadir(int&, int&, int&)’: user.cpp:68:16: warning: statement has no effect [-Wunused-value] dir==3; ^ user.cpp: In function ‘int main()’: user.cpp:97:36: warning: unused variable ‘xf’ [-Wunused-variable] int i=xi,j=yi,maxx=0,pas=0,ok=0,xf,yf; ^ user.cpp:97:39: warning: unused variable ‘yf’ [-Wunused-variable] int i=xi,j=yi,maxx=0,pas=0,ok=0,xf,yf; ^